ELFT HÍRADÓ

[Zoltan Mate <mate AT atomki.mta.hu>]

Az MTA Atommagkutató Intézetének előadótermében
(Debrecen, Bem tér 18/c. 12. ép. III. em.)
2012. november 29-én, csütörtökön 11:00-kor


                Irka HAJDAS
  (Laboratory of Ion Beam Physics, ETH Zurich)

      Radiocarbon dating of lake sediments
    for understanding of the past 50,000 yrs


címmel előadást tart.

Az előadás előtt 10:30-tól tea, vendégeket szívesen látunk.


                                           Máté Zoltán


Kivonat:
Among continental archives lake sediments are nearly the most studied 
records of past environmental changes. Certainly it is the wealth of proxy 
(sedimentary information, tephra, pollen, stable isotopes, macrofossils, 
geochemistry, palaeomagnetic, charcoal etc.) that can be recovered from 
lake deposits that places them on top of the list. On the other hand there 
other natural archives such as ice cores or tree rings that are considered 
to be superb because of resolution and precise chronological time control. 

After more than 20 years of applying 14C dating to building time scales of 
various lakes around the globe I am still confident that lake sediments 
are most valuable material to study. The great advantage of lakes is that 
there are quite common and distributed around the globe. Global nature of 
14C allows correlation and synchronisation. Moreover, new possibilities 
and developments in AMS 14C dating increase chances for obtaining reliable 
chronologies of those records. 

I will present an overview studies and discuss various problems (such as 
hard water effect) occurring in those records.